Kösem Sultan (1590 – 2 September 1651) – also known as Mahpeyker Sultan was one of the most powerful women in Ottoman history. Kösem achieved power and influenced the politics of the Ottoman Empire when she became Haseki Sultan as favourite consort and later legal wife of Ottoman Sultan Ahmed I (1603–1617) and Valide Sultan. as mother of Murad IV (1623–1640) and Ibrahim (1640–1648), and grandmother of Mehmed IV (1648–1687). She was one of the prominent figures during the Sultanate of Women.